The Apera Instruments 601 Magnetic Stirrer features a reliable design and a powerful stirring ability. It comes with two magnetic stir bars (25mm and 30mm) and an electrode holder. The speed range is 0-2300 rpm. Working diameter: ø120 mm. Maximum stirring volume: 3000 ml (0.8 gallons). Powered by DC9V power adaptor. Ideal for laboratory use. Not suitable for highly viscous solutions. Glass beakers and electrodes are not included.